title: Friedelane triterpenoids from Maytenus macrocarpa.
abstract: A set of friedelane triterpenoids has been isolated from the stem bark exudates of Maytenus macrocarpa. It includes a new friedelan triterpene (1), together with the known compounds friedelin, 3-oxo-29-hydroxyfriedelane, 3-oxofriedelan-25-al, and canophyllol. The structures of these compounds were elucidated by spectroscopic and chemical evidence. Complete 1H and 13C assignments were achieved by 2D NMR spectroscopy. The new compound showed weak activity against aldose reductase. It did not display antitumor activity against P-388 lymphoid neoplasm, A-549 human lung carcinoma, HT-29 human colon carcinoma, or MEL-28 human melanoma cell lines.
authors.affiliation: Instituto Universitario de Bio-Orgánica, Antonio Gonzalez, Universidad de Laguna, Tenerife, Canary Island, Spain.
authors.forename: H
authors.initials: H
authors.lastname: Chávez
authors.forename: A
authors.initials: A
authors.lastname: Estévez-Braun
authors.forename: A G
authors.initials: AG
authors.lastname: Ravelo
authors.forename: A G
authors.initials: AG
authors.lastname: González
mesh_terms: D000449:Aldehyde Reductase / Q000037:antagonists & inhibitors; D000818:Animals; D000972:Antineoplastic Agents, Phytogenic / Q000302:isolation & purification* / Q000494:pharmacology; D004354:Drug Screening Assays, Antitumor; D004791:Enzyme Inhibitors / Q000302:isolation & purification / Q000494:pharmacology; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D051379:Mice; D008811:Mice, Inbred DBA; D019441:Plant Epidermis / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D014315:Triterpenes / Q000302:isolation & purification* / Q000494:pharmacology; D014407:Tumor Cells, Cultured
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D004791:Enzyme Inhibitors; D014315:Triterpenes; D000449:Aldehyde Reductase